Q. On the basis of the following E° values, the strongest oxidizing agent is [Fe(CN)₆]⁴⁻ → [Fe(CN)₆]³⁻ + e⁻; E° = −0.35 V Fe²⁺ → Fe³⁺ + e⁻; E° = −0.77 V
A) [Fe(CN)₆]³⁻
B) [Fe(CN)₆]⁴⁻
C) Fe²⁺
D) Fe³⁺
Explanation
[Solution from source] The values given are oxidation potentials, so the reduction potentials are +0.35 V for [Fe(CN)₆]³⁻/[Fe(CN)₆]⁴⁻ and +0.77 V for Fe³⁺/Fe²⁺. The species with the higher reduction potential is the stronger oxidising agent, so Fe³⁺. [Fe(CN)₆]⁴⁻ and Fe²⁺ are the reduced forms and act as reducing agents. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.